"They`re hoping that overnight they`ll have a pretty good handle on it," he said.

But Maribeth Pecotte, spokeswoman for the U.S. Forest Service, said today`s weather -- temperatures in the lower 60s and 12 to 20 mile-per-hour winds -- could reactivate the fire`s hot spots.

Four hand crews and seven engines, about 125 firefighters total, will continue to be on scene today in Lefthand Canyon, which is about eight miles north-northwest of Boulder. They`ll still have one helicopter at their disposal, while the second helicopter and an air tanker were released from duty Sunday.

The remaining 20 percent of the fire is burning in steep, difficult terrain with no road access.

Most residents of the 223 homes evacuated Friday returned later that day. Residents of the last 15 to 20 homes -- all above Geer Canyon Drive -- were allowed back in at 5 p.m. Saturday. The fire was 60 percent contained Sunday morning after a small amount of rain overnight Saturday. About 150 firefighters spent Sunday battling the fire.

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While the fire has not damaged any of the 12 homes that were threatened, crews have spent $500,000 battling the blaze.

The cause remains under investigation, but the U.S. Forest Service has deemed the fire to be human-caused based on the location where the fire started and the lack of lightning or power lines in the area.

The firefighters working in Lefthand Canyon are from local volunteer fire departments; county, state and federal resources; as well as crews from Arizona (San Carlos Crew), Grand Junction (Juniper Crew), Idaho (Payette Hotshots) and Craig (Green River Crew).

Structure protection is being provided by the Lefthand Fire Protection District.